Yielding release for mills and crushers



y 6, 1952 'o. c. GRUENDER 2,595,249

YIELDING RELEASE FOR MILLS AND CRUSHERS Filed Oct. 20, 1949 3 Sheets-Sheet l .132 verzzor Uscar C raenaer y 6, 1952 o. c. GRUENDER YIELDING RELEASE FOR MILLS AND CRUSHERS 3 Sheets-Sheet 2 Filed Oct. 20, 1949 May 6, 1952 o. c. GRUENDER YIELDING RELEASE FOR MILLS AND CRUSHERS' 3 Sheets-Sheet 5 Filed Oct. 20, 1949 0.906176. firzzender I ifzarzze ys.

ia tnted May 6, 1952 v 2,595,2'49 YIELDING RELEASE Eek-Mints AND GRUSHERS i. m:- M waukee,

N db a-nufa'oturing Q mpa-ny, Milwaukee, Wis e6 poi'atio'ii 'of Wis'oii'siii 1 'olaiiiii (01. 241 290) V 'Rotii'tiiaie about tHQ exterior -y1 iiriea 's'iii, face 21 of the 'eccentr'ically 93) rthfe'd sleeve LIB is the head stirl ict'u're geneia lly indidatedes '22 It includes 'a doysipwardly exten ing sleeve 2s with a liner 24 Whih 811110111315 thebuiferlS'liljface 2| of the ecc'eht ical ly apertures sleeve 13, The head. iS als 'proi' ideii 'withe downwrdly spherical portion 2; opposed'asiiit ble'sphelf- 'i'eal bearing ting 26jjinou'nted un or forriiihg a pain oiiheirame. The-head also hasskirt p'or tions 21. 28jarj1d a generally spherical surfaced sealing mmbef 29 which extends j into apirz ih'rhifrential 1 seaHhgeaVity v30,1116 urited in; main frame, If it is tisir wa ei ,m y e imulated th'ro'u'gh the annular troug faiiw'lierby a s'e'alf- 'i' re'lation is maintain d Wii;h fthe mem er 29 Whiph, at gll tims, 'exteiiqs belbw the surface of h w e t 1l s 30- i i Aiifiy ab f fl ng m nSif h r Sh W maybe mounted u on the upper portion oi'the head 2- i 4 enierjis-a bi t fee [Znd the aggs 72 galny w i ip i i .q if i g ii fm iiii ii .1mm b re' novgblymo iiiteqiibofifqhehead2 i tails of the 'ittachmeht do n of form part of t he present inyenigi'oii' aii c'lafe hot tering flange 43. The flange 43 has a generally cylindrical outersurface 44 which may, if desired, be slightly barrel shape, upon which surface the below described bowl structure may at times tilt. The inner face of the flange 43 is generally conic, as indicated at 45.

Seated upon and centered by the flange 44 is the bowl supporting ring 46. It has a downwardly open channel 41 conforming generally to the conic surface 45, as at 48. It has an outer cylindrical surface 49 opposed to the outer surface 44 of the flange 43. The support 46 also has outwardly extending portions 50 apertured as at to permit the passage therethrough of bolts or compression members 52. Each such bolt is shouldered as at 53, the shank of each bolt passing through an appropriate aperture in the annulus 40, the head 53 abutting the lower surface of the annulus and being positioned within a socket or aperture 4 in the main frame flange 2. Below each head 53 is a reduced portion 55 which extends through the aperture 6 which may receive any suitable locking nuts 56. The ring or bowl support 46 has an upwardly extending generally cylindrical wall extending upwardly from the outer edge of a ridge or offset 6|. The member 45 is inwardly threaded as at 52.

Surrounding and outwardly spaced on the support 46 is the outer ring or housing element 85. It is centered about the flange 42 and may be adjusted by shims 66. At its upper end it is provided with an inner abutment flange 61, apertured as at 68 to permit the passage therethrough of the bolts or compression members 52. 69 are any suitable nuts or abutments opposed to the upper surface of the flange 61. The space between the upper edges of the members and 48 may be enclosed by a flexible housing formed of rubber or fabric members 10, 1| connected at their outer edges, for example by any suitable ring or angle member 12.

Adjustable within the bowl support 46 is the bowl structure generally indicated as 15. It has an outer generally cylindrical component 16, outwardly screw-threaded as at 11, to mesh with the threads 62. It has a bottom component 18 to which the bowl liner or wear-taking members 19 may be suitably secured. The member connects the inner edge of the members 18 with the upper edge of the outer cylindrical portion 16. It may also carry any suitable, removable weartaking hopper 8 I,

82 is an outwardly extending top flange sealed against the inner surface of the wall 60, as at 83. 84 is a downward extension of the cylindrical portion 15, which is sealed as at 85 to an opposed flange 86 outwardly extending from the bowl support 46. 81 are adjusting screws which pass through appropriately screw-threaded apertures in the flange 82, and abut the upper surface of the ridge 6|. They are shown as having upper square heads 88 and as being provided with any suitable lock nuts 88. These look nuts are laterally accessible through windows in the generally cylindrical upward extension 9| of the bowl. It will be understood that when the screws 81 are released, the bowl structure 15 may be rotated in relation to the bowl support 46. The result is an upward or downward adjustment. When the desired adjustment is reached, the bolts 81 may be screwed into position. The square heads 88 are freely accessible from above. The lock nuts 89 may be tightened, being readily accessible through the windows 80.

The upward extension 9| is exteriorly provided with a plurality of teeth I00. The upward extension 60 is provided with an upwardly extending notch or depression |0|. I02 generally indicates a locking member having a shank I03 extending into the socket or recess HH and having a plurality of teeth W4, adapted to extend into the teeth |00 formed in the exterior of the member 9|. The lock N32 is eifective to prevent relative rotation of the bowl structure 15 and of the bowl support or adjusting ring 46.

It will be realized that whereas I have described and shown a practical and operative device, nevertheless many changes may be made in size, shape, number and disposition of parts without departing from the spirit of my invention. I therefore wish my description and drawings to be taken as in a broad sense illustrative or diagrammatic, rather than as limiting me to my precise showing herein. It will be understood, for example, that my spring release may be employedwith a wide variety of crushers, including so-called cone and gyratory crushers, the particular crusher parts herein shown being indicated merely as a matter of illustration.

The use and operation of my invention are as follows:

I illustrate a main frame and gyrating mechanism, including the fixed shaft I0 and the eccentrically apertured sleeve |3, which are adapted for the support and gyration of a crushing head or cone. In the particular mechanism herein described and shown, a crushing cavity is deflned between the mantle 22a on the head and the bowl liner [9 supported on the bowl i5. Material is fed from above into the upper, inner feed receiving aperture of the cavity defined between the two feed members. The gyration of the head subjects the material to be crushed or ground to a series of crushing nips. The crushed material flows outwardly from the circumferential discharge outlet of the crushing cavity. It is ad vantageous, and under some circumstances vitally necessary, to provide a yielding release which will prevent breakage or jamming in the event any uncrushable material is present in the crushing cavity. Such yielding release may be necessitated by packing of the material in the cavity when crushing wet or by the passage of hard or oversize particles, including drill bits, dipper teeth,'or other uncrushable members.

An advantage of the structure herein shown is that I have included a yielding release in a bowl and bowl supporting structure which can be readily removed as a unit from the main frame. The ring 40 rests upon and surrounds the main frame flange 2. If desired, it could be positively secured to the flange 2, although under most cir cumstances a mere press fit is satisfactory. The bowl support proper 46 is centered upon the flange 43 and the bolts or compression members 52, shouldered as at 53, are movable with the ring 40. To remove the entire assembly, including the bowl support and the bowl, all that need be done is to release the nuts 50. When these are removed, the entire bowl assembly, including the ring 40, can be upwardly lifted and" removed for repair, adjustment or replacement without in the least disturbing the compression of the springs 95. Where it is important to keep a continuous flow of material, as in a large mill, a spare assembly may be maintained ready and may be quickly dropped into position, with the result that the flow of material through the mill need be interrupted for only a very short period.

It will be clear, for example from Figure 2, that entire bowl structure, including rounds each bolt or compression member 52. The l springs are compressed between the flanges B7 and 50. The springs are completely housed within the housing member 65.

In event that uncrushable material passes through the crushing cavity, the bowl support 46 will tilt upwardly in relation to the flange 43. The result will be a slight inward movement of the upper edge of the cylindrical wall 60. Since the members 70 and H are of flexible material, they give slightly but still maintain an adequate seal for the upper end of the space in which the springs 95 are positioned. There is no damaging entry of dust or grit. The tilting is permitted and guided by the formation of the flange 43. Its outer face 44 may, if desired, be slightly barrel shaped, as in the corresponding part 20 of United States Letters Patent N 0. 2,358,038 assigned to the assignee of the present application. However, under many circumstances this is not necessary, as adequate clearance may be provided between the opposed surfaces 44 and 49.

I provide a compact and efiicient bowl supporting structure in which the bowl may be readily adjusted upon release of the lock screws 81. The annular shims 66 may be of varying thickness and ofler a convenient means for varying the tension of the springs 95, compressed between the overlapping flanges 50 and 61. Any suitable means may be used for clamping the vertical fabricated ring 10 in position in relation to the housing members 65. I illustrate, for example, the clamping ring 10a. The fact that the bolts 52 are provided with shoulders 53 abutting the ring 40 makes it possible to compress the springs 95 independently of the main frame. This permits the be removed from the main frame without at all disturbing the compression of the springs.

I claim:

In a bodily removable bowl supporting unit for gyratory crushers, a ring formed and adapted to rest upon an upper frame flange of a crusher, the

the springs, to 40 ring having an inwardly located, tapered bowl centering flange, a bowl support tiltably mounted on said flange, a bowl adjustably mounted on said support, an outer housing resting in sealed relationship upon said ring and surrounding said bowl support, a sealing closure between iipper parts of said housing and bowl support, compres sion members extending through said ring each said compression member having portions extending downwardly below said ring and portions extending upwardly from said ring within thespace between the bowl support and the housing, said compression members having abutment engaging upper portions of said housing and lower portions of said ring, springs about said compression members, said springs being under compression between upper portions of said housing and lower portions of said bowl support, the lower portions of said compression members being formed and adapted to be positioned in securing relationship with the upper frame portion of'the crusher upon which the ring rests.

OSCAR C. GRUENDER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,953,472 Fahrendwald Apr. 3, 1934 2,341,543 Gruender Feb. 15, 1944 2,438,049 Gruender Mar. 16, 1948 

